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霞浦大湾铍钼矿区处于闽东火山断坳带与建阳-柘荣近东西向断裂带交汇处的东北部,矿体主要产于晚侏罗世南园群鹅宅组与赤水组火山碎屑岩接触带附近的裂隙带中。辉钼矿石英脉呈脉状、少量透镜状;铍矿体呈陡倾角似层状分布在辉钼矿体两侧,主要产于角岩化、绢英岩化、硅化、云英岩化等蚀变带中。矿床的形成具多阶段性,受构造裂隙和岩浆热液活动的控制,属中-高温热液充填-交代型铍钼矿床。
The Xiapu Dayan beryllium-molybdenum mine is located in the northeastern part of the Mindong volcanic off-reanction zone and the junction of the Jianyang-Qirong near-east-west fault zone. The ore body is mainly produced in Late Jurassic Nanyuan Group goose-house and Chishui-group volcaniclastic rocks In the vicinity of the contact zone of the fracture zone. The molybdenite vein has a vein-like shape and a few lenticulars. The beryllium ore body has a steep dip like stratification on both sides of the molybdenite ore body, mainly occurring in hornfels, sericites, silicification, and dolomitic rocks Alteration zone. The formation of the deposit is multi-stage and controlled by tectonic fractures and magmatic hydrothermal activities. It belongs to the medium-high temperature hydrothermal filling-replacement type beryllium-molybdenum deposit.